Agile and Waterfall Model uses and difference in SDLC #DOTC_Mdb

Agile and Waterfall Model uses and difference in SDLC.

Hello Everyone,

Today we will discuss about how both the model uses in Software Projects and why agile preferred over traditional Waterfall Model. In previous blogs i discussed about Agile model and SDLC so please go through my below blogs for better understanding.

https://dheeraj60.blogspot.com/2020/07/overview-of-agile-modelmethodology.html

https://dheeraj60.blogspot.com/2020/07/concept-of-software-development-life.html

 

First we need to understand Waterfall Model ,The waterfall model is a classical model used in system development life cycle (SDLC)to create a system with a linear and sequential approach. It is termed as waterfall because the model develops systematically from one phase to another in a downward fashion. In waterfall model the sequence of pre -defined phases including feasibility, planning, design, build, test, production, and support. But On the other hand, we know Agile development methodology follows a linear sequential approach while providing flexibility for changing project requirements. Also Agile Model allows more flexibility to adapt to the changes.

Nowadays Agile is prefer over waterfall model , Let’s understand the difference between both the model .

1.Software development process is divided into different phases in the Waterfall model while Agile methodology segregates the project development lifecycle into sprints ,Waterfall is a structured software development methodology, and often times can be quite rigid, whereas the Agile methodology is known for its flexibility.

2. In Waterfall model, software development is to be completed as one single project, which is then divided into different phases, with each phase appearing only once during the SDLC(Software Development Life Cycle). However the Agile methodology can be considered as a collection of many different projects, which are nothing but the iterations of the different phases focusing on improving the overall software quality with feedbacks from users or clients.

3 .If we want Waterfall model for software development, then we have to be clear with all the development requirements before hand as there is no scope of changing the requirements once the project development starts and it’s not good if any changes needs from client’s end but in the Agile methodology allows for changes to be made in the project development requirements even after the initial planning has been completed as agile is more flexible.

4. Project development phases such as designing, development, testing, etc. are completed once in the Waterfall model while as part of the Agile methodology, they follow an iterative development approach. As a result, planning, development, prototyping and other software development phases can appear more than once during the entire Software development life Cycle.

5. Major differences between Agile and Waterfall development methodology is their individual approach towards quality and testing. In the Waterfall model, the Testing comes after the Build/Development phase, but, in the Agile methodology, testing is typically performed with programming or at least in the same iteration as programming whereas in waterfall model testing comes after the development phase.

6. Waterfall methodology is an internal process and does not require the customers/Clients, whereas in the Agile software development approach focuses on customer satisfaction and thus, involves the participation of customers throughout the development phase

7.Waterfall model can be regarded as a stringently sequential process, however, the Agile methodology is a highly collaborative software development process, thereby leading to better team input and faster problem solving. Waterfall model is best suited for projects which have clearly defined requirements and in which change is not expected at all, while Agile development supports a process in which the requirements are expected to change. So, if you are planning to develop software that would require frequent changes and has to keep up with the technology and customer requirements, Agile is the best model to follow.

Above are the Differences between both the models and now we can simply say whenever we have clear about defined requirements of the projects and change is not expected in defined projects we can use Waterfall Model , but whenever changes is required during the projects Agile model is best as it’s very flexible and whenever any change needs to be done as per customer requirements , Agile model is used.

This is the main reason nowadays Agile Model is used in most of the projects due to flexibility but still in some products waterfall model is used. Please go through this blog and let me know if you have any doubts as this blog is useful for computer science graduate as well as for Candidate who is looking for job in IT industry to understand both the model how it’s work for any product/software development.

Thanks.